CN205067716U - Online calibration system of electric energy meter - Google Patents
Online calibration system of electric energy meter Download PDFInfo
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- CN205067716U CN205067716U CN201520666543.7U CN201520666543U CN205067716U CN 205067716 U CN205067716 U CN 205067716U CN 201520666543 U CN201520666543 U CN 201520666543U CN 205067716 U CN205067716 U CN 205067716U
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Abstract
The utility model provides an online calibration system of electric energy meter. This system includes the collection equipment of front end, the pre treatment device of rear end, digital electric energy meter check gauge and main website, and wherein, the data network that collection equipment passes through electric power links to each other with pre treatment device, pre treatment device links to each other with digital electric energy meter check gauge and main website. Tradition voltage transformer's secondary side voltage, traditional current transformer's secondary side electric current insert simultaneously and are examined electronic type electric energy meter and collection equipment, the digital voltage current sample value of merging cells or switch inserts is simultaneously examined digital electric energy meter and collection equipment, the pulse output of electric energy meter inserts collection equipment. The utility model discloses an online check -up of tradition transformer substation electronic type electric energy meter and the digital electric energy meter of digital transformer substation has realized the long -range real -time on -line monitoring and online check -up of electric energy meter each item index, has solved not enough that present mode existed. The utility model discloses simple structure, thought are leading, and the system is with low costs, accords with metering device's development trend. Simultaneously, change current mode, improved work efficiency.
Description
Technical field
The present invention design a kind of can the online check system of remote detection electric energy meter operation characteristic, be mainly used in error and the abnormal conditions of the Real-Time Monitoring electric energy meter when electric energy meter charging operation.
Background technology
Electric energy meter mainly contains electronic electric energy meter and digital electric energy meter.Current management method is mainly: 1, carry instrument and equipment by professional and carry out periodic inspection to scene; 2, standard scale is put into the mode of transformer station; The detection management also imperfection of digital electric energy meter simultaneously.There is the problem of following several respects in above-mentioned detection method:
(1) the artificial calibration interval are longer, are difficult to the metering fault that Timeliness coverage occurs between twice inspection, thus have a great impact accounting management;
(2) at every turn when carrying out on-the-spot accuracy test to electric energy meter, need operations such as unclamping the connection terminal on measuring screen and screw, multi-pass operations often has connection terminal to loosen or stripped thread phenomenon later, there is comparatively major break down hidden danger;
(3) during field-checking electrical energy meter accuracy, the load of secondary circuit be there are certain requirements to (general active power is greater than 10W, power factor > 0.5), once load or power factor too low, work of can not testing, causes coming back after a vain attempt;
(4) artificial cycle calibration operation amount is large, working strength is high, and labor management flow process is lengthy and tedious, the efficiency of management is low;
(5) standard scale uses in laboratory environments, and in transformer station under the condition such as strong electromagnetic, temperature, humidity change complex environment, the precision and stability of standard is affected;
(6) detection management of digital electric energy meter is perfect not enough.
Summary of the invention
The present invention is directed to the deficiency existing for conventional monitoring methods, propose a kind of electric energy meter on-line testing system, achieve the on-line testing of substation electric energy meter, long-range real time on-line monitoring can be carried out to the indices of traditional electrical minor electric energy meter and digital electric energy meter.
Design proposal of the present invention:
A kind of electric energy meter on-line testing system, comprises the collecting device of front end, the pre-processing device of rear end, digital electric energy meter tester and main website, and wherein, collecting device is connected with pre-processing device by the data network of electric power; Pre-processing device is connected with main website with digital electric energy meter tester.For electronic electric energy meter, the electrical energy impulse signals that the secondary loop voltage current signal of access electric energy meter side and electronic electric energy meter export accesses collecting device simultaneously; For digital electric energy meter, the secondary loop voltage current signal of access digital electric energy meter side is directly from the merge cells or switch device at scene, and the electrical energy impulse signals that digital electric energy meter exports accesses collecting device simultaneously.The signal of access gathers by collecting device, A/D conversion and time synchronized after, convert the SMV sampling value message meeting IEC61850-9-2 agreement to, and convert sampling value message to HTTP message, the pre-processing device of rear end is passed to again by the data network of electric power, the HTTP message received carries out resolving and storing by pre-processing device, after receiving the check command of main website, the electrical energy pulse that IEC61850-9-2SMV sampling value message after parsing and electric energy meter export is sent to digital electric energy meter tester by pre-processing device, digital electric energy meter tester verifies electric energy meter according to the principle of the real load calibrating of digital electric energy meter, and checking data is sent to pretreatment unit, checking data is sent to main website by pretreatment unit again, main website carries out poke to checking data, analyze and present.When the error of tested electric energy meter overproof or abnormal time, main website reports to the police.
The present invention has the following advantages:
1, electric energy meter on-line testing system of the present invention, achieve the on-line testing of traditional transformer station electronic electric energy meter and digital transformer substation digital electric energy meter, can the various abnormal conditions of Timeliness coverage field electric energy table, ensure that the accuracy of electric energy meter, there is obvious economic benefit.Staff can go site disposal problem the very first time, reaches and deals with problems fast, targetedly, reduces because of electric energy meter exception or measures the inaccurate economic loss caused to electric power.
2, electric energy meter on-line testing system of the present invention, structure is simple, on-the-spotly only need install collecting device, after disposable installation, without the need to the connection terminal on personnel on site's multi-pass operations measuring screen, greatly reduces man-made fault and potential safety hazard that work on the spot may exist.
3, electric energy meter on-line testing system of the present invention, all place one piece of standard scale without the need to each transformer station, only need place a digitizing powermeter verification instrumeter in the rear end of customer side, system cost is low, meanwhile, it also avoid standard scale and be placed on problems existing under transformer station's complex environment.
4, electric energy meter on-line testing system of the present invention, to collection and the verification operation of field electric energy table real time data, all complete in the work computer of client, realizing is the mode of operation of repair based on condition of component, on-line monitoring from original regular annual test prerun, breakdown repair working mode change, greatly improve the work efficiency of personnel, improve the lean management of electric energy meter, establish good corporate image, the competitive power of enterprise, has good social benefit.
5, electric energy meter on-line testing system of the present invention, core concept is front-end collection, rear end verifies, no matter be traditional electronic electric energy meter or digitalized electrical energy meter, all realize on-line testing function according to the standard agreement of digital transformer substation and the real load calibrating principle of digitalized electrical energy meter, meet the development trend of electric power meter, thought is advanced.
Accompanying drawing explanation
Fig. 1 is system chart of the present invention.
Fig. 2 is the theory diagram of collecting device of the present invention.
Embodiment
Below in conjunction with drawings and Examples, the present invention will be further described.
As described in Figure 1, a kind of electric energy meter on-line testing system, comprises the collecting device of front end, the pretreatment unit of rear end, digital electric energy meter tester and main website, and wherein, collecting device is connected with pre-processing device by the data network of electric power; Pre-processing device is connected with main website with digital electric energy meter tester.
Collecting device: the nucleus equipment being transformer substation side, as shown in Figure 2, comprises channel switching module, A/D converter module, pulse collection module, clock synchronization module, controller module and protocol converter module.For electronic electric energy meter, the analog voltage current signal of secondary circuit and the pulse signal of electric energy meter output before synchronous acquisition access electric energy meter.Voltage and current signal is after channel switching module, A/D converter and synchronizing signal, analog voltage current signal is converted to the digital signal of one group of time synchronized, this digital signal meets the SMV sampling value message of the IEC61850-9-2 agreement of digital transformer substation completely; Pulse signal retention time rising edge and negative edge recorded thereon under high-precision clock signal that electric energy meter exports, and by these Information expansions in the digital signal of the one group of time synchronized just now obtained, this part uses the self-defined part in SMV message to complete.For digital electric energy meter, from merge cells or switch, obtain the digitized voltage current signal of secondary circuit before access electric energy meter, and be given to protocol converter by channel switching module; Pulse signal retention time rising edge and negative edge recorded thereon under high-precision clock signal that electric energy meter exports, and by these Information expansions in the IEC61850-9-2SMV sampling value message just now obtained, this part uses the self-defined part in SMV message to complete.Finally, the IEC61850-9-2SMV sampling value message of acquisition is carried out protocol conversion by protocol converter, converts the HTTP message meeting data transmission to, is passed to the pre-processing device of rear end by electric power data network.Collecting device comprises organizes channel switching module more, can realize the collection of multichannel data.
Pre-processing device: convert the HTTP message got to IEC61850-9-2SMV sampling value message, and pulse information is extracted, store respectively, after receiving the check command that main website sends, first the pulse information extracted is reduced into the pulse signal that electric energy meter exports, synchronously the pulse signal that the standard SMV message containing electric current and voltage sampled value and electric energy meter export is passed to digital electric energy meter tester, checking data is sent back by digital electric energy meter tester, store, meanwhile, main website is passed back.
Digital electric energy meter tester: this programme uses the XL-808 digital electric energy meter tester of Shenzhen Star Dragon Technology Co., Ltd..The real load calibrating principle of digital electric energy meter is adopted to verify electric energy meter.The real-time parameters such as test voltage, electric current, active power, reactive power, applied power, frequency, phase place, power factor, oscillogram, polar plot, carry out on-line testing to electric energy meter error.
Main website: main website by pre-processing device to digital electric energy meter tester transmitting order to lower levels, realize parameter configuration, manual School Affairs automatic check function, receive the checking data that pretreatment unit is passed back, main website stores checking data, analyze and present, and Modling model is to each real-time parameter and electric energy meter error data analysis, assessment, draws terminal check result.When the error of tested electric energy meter overproof or abnormal time, main website reports to the police.
Above-described embodiment is only the preferred embodiments of the present invention; not in order to limit the present invention; for a person skilled in the art; the present invention can have various modifications and variations; within the spirit and principles in the present invention all; any amendment of doing, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (2)
1. an electric energy meter on-line testing system, comprises the collecting device of front end, the pre-processing device of rear end, digital electric energy meter tester and main website, and wherein, collecting device is connected with pre-processing device by the data network of electric power, pre-processing device is connected with main website with digital electric energy meter tester, and for electronic electric energy meter, the electrical energy impulse signals that the secondary loop voltage current signal of access electric energy meter side and electronic electric energy meter export accesses collecting device simultaneously, for digital electric energy meter, the secondary loop voltage current signal of access digital electric energy meter side directly obtains from the merge cells at scene or switch device, access collecting device with the electrical energy impulse signals that digital electric energy meter exports simultaneously, the signal of access gathers by collecting device, A/D conversion and time synchronized after, convert the SMV sampling value message meeting IEC61850-9-2 agreement to, and convert sampling value message to HTTP message, the pre-processing device of rear end is passed to again by the data network of electric power, the HTTP message received carries out resolving and storing by pre-processing device, after receiving the check command of main website, the electrical energy pulse that IEC61850-9-2SMV sampling value message after parsing and electric energy meter export is sent to digital electric energy meter tester by pre-processing device, digital electric energy meter tester verifies electric energy meter according to the principle of the real load calibrating of digital electric energy meter, and checking data is sent to pretreatment unit, checking data is sent to main website by pretreatment unit again, main website carries out poke to checking data, analyze and present, when tested electric energy meter exception or error overproof time, main website reports to the police.
2. electric energy meter on-line testing system according to claim 1, it is characterized in that: described collecting device comprises channel switching module, A/D converter module, pulse collection module, clock synchronization module, controller module and protocol converter module, support the collection of multiple signals, collection signal is converted to the digitized signal of one group of time synchronized, meet digital transformer substation IEC61850-9-2 agreement completely.
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105486918A (en) * | 2016-01-18 | 2016-04-13 | 广东美的暖通设备有限公司 | Electric quantity management method and system |
| CN105954705A (en) * | 2016-07-06 | 2016-09-21 | 国网上海市电力公司 | Digital electric energy measuring equipment remote calibration system and method |
| CN105988100A (en) * | 2016-07-05 | 2016-10-05 | 中国电力科学研究院 | Method and system for remotely calibrating intelligent substation digital electric energy metering device |
| CN106199485A (en) * | 2016-06-22 | 2016-12-07 | 国网宁夏电力公司电力科学研究院 | High-voltage electric energy meter remote online check system |
| CN106199489A (en) * | 2016-07-06 | 2016-12-07 | 国网上海市电力公司 | Laboratory reproduction type digitalized electric energy measuring equipment remote calibration system and method |
| CN106918799A (en) * | 2017-04-12 | 2017-07-04 | 华北电力科学研究院有限责任公司 | Electric energy meter remote checking method and system |
| CN107402368A (en) * | 2017-09-19 | 2017-11-28 | 贵州电网有限责任公司电力科学研究院 | A kind of digitalized electrical energy meter actual load calibration device and method of calibration |
| CN107436420A (en) * | 2016-05-27 | 2017-12-05 | 山东大学 | A kind of electric energy metrical remote verification monitoring system and its method of work |
| CN109471060A (en) * | 2018-11-13 | 2019-03-15 | 国网天津市电力公司 | A kind of device for monitoring digital electricity meter metering accuracy on-line |
| CN109725279A (en) * | 2018-12-26 | 2019-05-07 | 国网江苏省电力有限公司电力科学研究院 | A kind of electric energy metering device compares synthetical error analysis platform online |
-
2015
- 2015-08-31 CN CN201520666543.7U patent/CN205067716U/en active Active
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105486918A (en) * | 2016-01-18 | 2016-04-13 | 广东美的暖通设备有限公司 | Electric quantity management method and system |
| CN107436420A (en) * | 2016-05-27 | 2017-12-05 | 山东大学 | A kind of electric energy metrical remote verification monitoring system and its method of work |
| CN106199485A (en) * | 2016-06-22 | 2016-12-07 | 国网宁夏电力公司电力科学研究院 | High-voltage electric energy meter remote online check system |
| CN105988100A (en) * | 2016-07-05 | 2016-10-05 | 中国电力科学研究院 | Method and system for remotely calibrating intelligent substation digital electric energy metering device |
| CN106199489A (en) * | 2016-07-06 | 2016-12-07 | 国网上海市电力公司 | Laboratory reproduction type digitalized electric energy measuring equipment remote calibration system and method |
| CN105954705A (en) * | 2016-07-06 | 2016-09-21 | 国网上海市电力公司 | Digital electric energy measuring equipment remote calibration system and method |
| CN106918799A (en) * | 2017-04-12 | 2017-07-04 | 华北电力科学研究院有限责任公司 | Electric energy meter remote checking method and system |
| CN107402368A (en) * | 2017-09-19 | 2017-11-28 | 贵州电网有限责任公司电力科学研究院 | A kind of digitalized electrical energy meter actual load calibration device and method of calibration |
| CN109471060A (en) * | 2018-11-13 | 2019-03-15 | 国网天津市电力公司 | A kind of device for monitoring digital electricity meter metering accuracy on-line |
| CN109725279A (en) * | 2018-12-26 | 2019-05-07 | 国网江苏省电力有限公司电力科学研究院 | A kind of electric energy metering device compares synthetical error analysis platform online |
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